This ambience comes from Five Nights at Freddy's 2, the 2014 horror game by Scott Cawthon. The game's tense audio design helped make its office and camera scenes memorable, and short ambient clips like this became easy to reuse in edits. Online, creators use it as a shorthand for dread, hidden danger or the feeling that a jumpscare is about to happen. It remains popular because even a brief loop instantly signals FNAF and creates suspense without needing dialogue or a loud sting.